CN102053749A - Touch sensitive device with dielectric layer - Google Patents
Touch sensitive device with dielectric layer Download PDFInfo
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- CN102053749A CN102053749A CN201010526485XA CN201010526485A CN102053749A CN 102053749 A CN102053749 A CN 102053749A CN 201010526485X A CN201010526485X A CN 201010526485XA CN 201010526485 A CN201010526485 A CN 201010526485A CN 102053749 A CN102053749 A CN 102053749A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0444—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single conductive element covering the whole sensing surface, e.g. by sensing the electrical current flowing at the corners
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
A touch sensitive device having a dielectric layer between a cover layer and a touch sensor layer is disclosed. The dielectric layer can reduce a negative pixel effect associated with poor grounding of an object touching the device. The dielectric layer can reduce a capacitance per unit area of the device to less than about 0.0305 picofarads per square millimeter, thereby reducing the negative pixel effect. The dielectric layer can have a thickness of about 0.50 millimeters or more and/or a dielectric constant of about 2.3 or less to reduce the negative pixel effect.
Description
Technical field
The present invention relates generally to touch-sensitive device, relates in particular to the touch-sensitive device with dielectric layer.
Background technology
At present, there is polytype input media can be used for, for example button or button, mouse, trace ball, operating rod, touch sensor panel, touch-screen or the like in the computing system executable operations.Especially, because easy to operate and function is a lot of and because price reduces, it is universal day by day that the touch-sensitive device such as touch-screen is just becoming.Touch-sensitive device can comprise touch sensor panel, and this panel can be to have the clear or opaque panel that touches sensitive surfaces.In some instances, touch-sensitive device can also comprise the display device such as LCD (LCD), this display device can partly or completely be in after the panel, so that touch at least a portion that sensitive surfaces can cover the display device viewing area, perhaps this display device also can dock with the viewing area of display device so that touch sensitive surfaces away from panel.Touch-sensitive device can allow the user to pass through to touch user interface (UI) appointed positions that is shown by display device usually with finger, stylus or other objects and carry out various functions.In general, touch-sensitive device can identification touch event and the position of this touch event on touch sensor panel, then, the demonstration that computing system manifests in the time of can be according to touch event comes this touch event of decipher, after this then can carry out one or more actions based on this touch event.
When touching the object imperfect earth of touch-sensitive device, the touch output valve of indication touch event might be wrong, perhaps has distortion in other respects.When on equipment the touch event of two or more whiles taking place, the probability that this mistake or distortion value occur might further increase.
Summary of the invention
The present invention relates to a kind of touch-sensitive device, described touch-sensitive device has the dielectric layer between overlayer and touch sensor layer.This dielectric layer can reduce the negative pixel effect that is associated with the imperfect earth of object touch apparatus.In order to realize this reducing, this dielectric layer can be reduced to the electric capacity of the unit area of touch-sensitive device and be lower than about 0.0305 pico farad/square millimeter.The thickness of dielectric layer can be about 0.50 millimeter or bigger, and/or its specific inductive capacity is about 2.3 or littler.This ability that reduces the negative pixel effect in the touch-sensitive device can advantageously provide faster and more accurate touch and detect very much, and can save electric power by repeating those measurements that are subjected to the influence of imperfect earth situation.In addition, this equipment can adapt to the different ground connection situations of user or other objects more healthy and stronglyer.
Description of drawings
Shown in Fig. 1 is illustration lamination according to the touch-sensitive device with dielectric layer of different embodiment.
Shown in Fig. 2 is the example methodology of making according to the touch-sensitive device with dielectric layer of different embodiment.
What Fig. 3 described is according to the negative pixel effect in the illustration touch-sensitive device with dielectric layer of different embodiment.
Shown in Fig. 4 is another illustration lamination according to the touch-sensitive device with dielectric layer of different embodiment.
Shown in Fig. 5 is can be in conjunction with the illustration computing system according to the touch-sensitive device with dielectric layer of different embodiment.
Embodiment
Will schematically show the specific embodiment that to implement in the accompanying drawing following with reference to the accompanying drawing that constitutes a part of the present invention in about the description of different embodiment.Should be appreciated that under the situation of the scope that does not break away from different embodiment other embodiment also are operable, and structure can change.
The present invention relates to a kind of touch-sensitive device, described touch-sensitive device has the dielectric layer between overlayer and touch sensor layer.This dielectric layer can reduce the negative pixel effect that is associated with the imperfect earth of object touch apparatus.In certain embodiments, this dielectric layer can be reduced to the electric capacity of the unit area of equipment and be lower than about 0.0305 pico farad/square millimeter, reduces the negative pixel effect thus.In certain embodiments, the thickness of dielectric layer can be about 0.50 millimeter or bigger, reducing the capacitive coupling between touch sensor layer and the imperfect earth object, thereby reduces the negative pixel effect.In certain embodiments, the specific inductive capacity of dielectric layer can be about 2.3 or littler, so that reduce the negative pixel effect.
This ability that reduces the negative pixel effect in the touch-sensitive device can advantageously provide faster and more accurate touch and detect very much, and can save electric power by repeating those measurements that are subjected to the influence of imperfect earth situation.In addition, this equipment can adapt to the different ground connection situations of user or other objects more healthy and stronglyer.
Term " imperfect earth ", " unearthed ", " not being grounded ", " local ground connection ", " ground connection is not so good ", " ground connection is incorrect ", " insulation " and " floating " can exchange use, so that be illustrated in the imperfect earth situation that may exist when object is not set up the Low ESR electric coupling with the earth terminal of touch-sensitive device.
Term " ground connection ", " proper grounding " and " ground connection is good " can exchange use, so that be illustrated in the good earth situation that may exist when the earth terminal of object and touch-sensitive device is set up the Low ESR electric coupling.
Shown in Fig. 1 is illustration lamination according to the touch-sensitive device with dielectric layer of different embodiment.In the example of Fig. 1, touch-sensitive device 100 can comprise overlayer 110, dielectric layer 120, touch sensor layer 130 and basal layer 140.Basal layer 140 can comprise the polymeric material such as polyethylene terephthalate (PET), so that serve as substrate with it.Other materials such as glass can be used as substrate equally.In certain embodiments, basal layer 140 can have the thickness of about 25 microns (μ m).Touch sensor layer 130 can comprise silver, copper, tin indium oxide conductive materials such as (ITO), and these materials can be used for the touch on the condenser type checkout equipment 100.In certain embodiments, touch sensor layer 130 can comprise that one or more common thickness are about the conductive material layer of 80 μ m.Touch sensor layer 130 can be deposited on the basal layer 140.Overlayer 110 can comprise transparent or opaque material, and for example glass or plastics are so that serve as protectiveness that is used for equipment 100 and/or the coverture with aesthetic feeling.In some instances, overlayer 110 can have the thickness of about 0.55 millimeter (mm).This overlayer 110 can have the tangible surface that supplies user and other objects to touch, and can adhere to or be assemblied on the dielectric layer 120.
Dielectric layer 120 can comprise the firm polymeric material of polypropylene and so on, so that serve as dielectric with it.As an alternative, dielectric layer 120 can comprise the permeable polymer material of acrylic plastering and so on, so that serve as dielectric with it.As an alternative, dielectric layer 120 can comprise the compound substance such as ceramic mixture, so that with its dielectric that charges.Other suitable materials can be used as dielectric equally.In certain embodiments, dielectric layer 120 can have about 0.50mm to about 0.60mm or bigger thickness.In certain embodiments, the specific inductive capacity of dielectric layer 120 can be about 2.3 or littler, perhaps more preferably about 1.5 or littler.Dielectric layer 120 can adhere to, assemble or otherwise be deposited between overlayer 110 and the touch sensor layer 130.In certain embodiments, dielectric layer 120 can deformation, the substantially invariable distance of maintenance between overlayer 110 and touch sensor layer 130 thus.On dielectric layer 120 facing surfaces, can use the bonding coat (not shown),, and on the apparent surface, dielectric layer is adhered to touch sensor layer 130 so that on a surface, dielectric layer is adhered to overlayer 110.This bonding coat can comprise pressure sensitive adhesive, epoxy resin, no bubble thin slice or the like.In certain embodiments, the thickness of each in this bonding coat can be about 50 μ m.
The lamination that it should be understood that touch-sensitive device is not limited to lamination shown in Figure 1, but can comprise other and/or extra play according to different embodiment.
Shown in Fig. 2 is the example methodology of making according to the touch-sensitive device with dielectric layer of different embodiment.In the example of Fig. 2, the substrate that basal layer can be used as touch-sensitive device provides (205).The touch sensor layer can be deposited on (210) on the basal layer.For example, this touch sensor layer can one or more layers form be printed on the basal layer, so that be formed for the sensor that condenser type detects the touch on the touch-sensitive device.Dielectric layer can adhere to or be assemblied in (215) on the touch sensor layer.For example, dielectric layer can be printed on the touch sensor layer.As an alternative, before adhering to or assembling dielectric layer, on the touch sensor layer, can use bonding agent, so that dielectric layer is fixed on the touch sensor layer.Overlayer can adhere to or be assemblied in (220) on the dielectric layer.Before overlayer being adhered to or be assembled to dielectric layer, on dielectric layer, can use bonding agent, so that overlayer is fixed on the dielectric layer.
Should be appreciated that the method that is used to make the touch-sensitive device with dielectric layer is not limited to method shown in Figure 2.According to different embodiment, also can use other and/or additional method.
The dielectric layer of Fig. 1 can be used for reducing touch-sensitive device and cause the negative pixel effect that produces because of imperfect earth object (for example user) touch apparatus.Fig. 3 has described according to the negative pixel effect in the illustration touch-sensitive device with dielectric layer of different embodiment.In the example of Fig. 3, touch sensor layer 330 can comprise pel array 326 (symbolically illustrating with ellipse).When electric excitation pixel 326-a, on pixel, can form mutual capacitance C
SigIn addition, on the pixel 326-a that is energized, can also form the electric field line that stretches out from touch sensor layer 330.The finger 350-a that touches on the pixel 326-a that is energized can stop some electric field lines.Here, because the user is an imperfect earth, therefore, can unpredictably transfers back to touch sensor layer 330 from the electric charge that is stopped electric field line, thereby between finger and touch sensor layer, form capacitor C by finger 350-a
FaSimultaneously, might touch and unpredictably be transferred back to touch sensor layer 330 at unexcited pixel 326-b because point 350-b from the electric charge that is stopped electric field line, thereby between finger and touch sensor layer, form capacitor C
Fb
As a result, with mutual capacitance C on the pixel 326-a that is energized
SigReduce desired value Δ C
SigDifference, C
SigMight only reduce (Δ C
Sig-Δ C
Neg), C wherein
Neg(C
FaAnd C
FbFunction) can represent so-called " negative capacitance ", described negative capacitance is to be produced owing to unpredictably being coupled to touch sensor layer 330 from the electric charge that is stopped electric field line because of user's imperfect earth.Touch signal still can be indicated the touch on the pixel 326-a that is energized, but the amount of touch of its indication will be less than the amount of touch of actual generation.
Equally, the finger 350-b on unperturbed pixel 326-b might be unpredictably increases C with the electric capacity of pixel
NegThereby, reach an electric capacity that exceeds the no touch situation, on the dead pixel, show so-called " negative pixel " or theoretic negative amount of touch thus.
The pixel of neighborhood pixels 326-a and 326-b may suffer from this equally because capacitor C
FaAnd C
FbAnd the negative pixel effect that causes shows theoretic negative amount of touch thus on these pixels.
The net result of user's imperfect earth might be that the touch signal of the actuate pixel (for example pixel 326-a) that is touched may die down, and neighbor (for example pixel 326-b and other pixels) might have negative touch signal.
In order to reduce this negative pixel effect, as shown in Figure 3, between overlayer 310 and touch sensor layer 330, can adhere to, assemble or dielectric layer 320 otherwise is set.This dielectric layer 320 can reduce the quantity from the touch sensor layer 330 that is coupled back by the electric charge of obstruction electric field line.As a result, can reduce to point capacitor C between 350-a and 350-b and the touch sensor layer 330
FaAnd C
Fb, and this will cause the electric capacity on the FU area to reduce, and reduces the negative pixel effect on the pixel 326 thus.Dielectric layer 320 can be reduced to a grade that is enough to reduce the negative pixel effect in the equipment by the unit-area capacitance with touch-sensitive device and realize this purpose.In some instances, dielectric layer 320 can reduce the electric field line that stretches out from touch sensor layer 330, reduces to be pointed the quantity of the electric field line of obstruction thus, and reduces the touch sensitivity of touch-sensitive device thus.But the benefit that reduces the negative pixel effect with dielectric layer 320 is compared, and this touch sensitivity loss is very little.
Table 1 shows is example according to the unit-area capacitance of the touch-sensitive device that has and do not have dielectric layer of different embodiment.
The unit-area capacitance of table 1. equipment
As shown in table 1, concerning the touch-sensitive device with dielectric layer, its unit-area capacitance (this electric capacity can be the serial electric capacity of the unit area of overlayer and dielectric layer) can obviously be reduced to below the unit-area capacitance (it can be tectal unit-area capacitance) of the touch-sensitive device with dielectric layer.For example, only be the touch-sensitive device of 0.55mm for overlayer, its unit-area capacitance (0.121 pico farad/square millimeter (pF/mm
2)) can be unit-area capacitance (0.0187pF/mm with touch-sensitive device of dielectric porous polyethylene layer
2) about 6.5 times, and can be unit-area capacitance (0.0305pF/mm with touch-sensitive device of the firm polyethylene layer of dielectric
2) about 4 times.For overlayer only is the touch-sensitive device of 1.15mm, its unit-area capacitance (0.0577pF/mm
2) can only the little about twice of unit-area capacitance of the touch-sensitive device of 0.55mm than overlayer.But, for overlayer only is the touch-sensitive device of 1.15mm, its unit-area capacitance still might be 3 times of unit-area capacitance with touch-sensitive device of dielectric porous polyethylene layer, and its unit-area capacitance is about 2 times of unit-area capacitance with touch-sensitive device of the firm polyethylene layer of dielectric.Have under the situation of dielectric layer, the unit-area capacitance that reduces can cause the negative pixel effect to reduce.
Should be appreciated that, be not subjected to the restriction of the example shown in the table 1, but can comprise difference and/or additional tolerance and numerical value, so that reduce the negative pixel effect according to the touch-sensitive device of different embodiment.For example, finger that the thickness of dielectric layer and/or specific inductive capacity can reduce to touch according to equipment and the capacity coupled needs between the touch sensor layer change, and realize the unit-area capacitance that reduces thus, and reduce the negative pixel effect.Similar change can be according to the equipment needs and with overlayer that dielectric layer is cooperated in carry out.In addition, according to the touch sensor layer is to form or exist between sensor electrode in certain pattern in gap to form in continuous level, and/or whether the finger that touches (or object) form the continuous conduction plane, and the electric capacity of unit area also can change.
Shown in Fig. 4 is another illustration lamination according to the touch-sensitive device with dielectric layer of different embodiment.In the example of Fig. 4, touch-sensitive device 400 can comprise overlayer 410, dielectric layer 420, touch sensor layer 430, first basal layer 440, second basal layer 450 and metal level 460.Second basal layer 450 can comprise the polymeric material of PET and so on, so that serve as substrate with it.Other materials such as glass can be used as substrate equally.In certain embodiments, second basal layer 450 can have the thickness of about 100 μ m.Metal level 460 can comprise conductive materials such as aluminium, copper, ITO, and wherein this conductive material can be used to provide grounded shield, for example provides between touch sensor layer 430 and other circuitries, perhaps otherwise transmits electric signal there.In certain embodiments, metal level 460 can have the thickness of about 10 μ m.Metal level 460 can be deposited on second basal layer 450.
Overlayer 410, dielectric layer 420, touch sensor layer 430 and first basal layer 440 can correspond respectively to overlayer shown in Figure 1 110, dielectric layer 120, touch sensor layer 130 and basal layer 140.First basal layer 440 of Fig. 4 can be attached to second basal layer 450 on the opposite of metal level 460.As described in Figure 1, on dielectric layer 420, can use the bonding coat (not shown),, and the apparent surface of dielectric layer is adhered to touch sensor layer 430 so that a surface of dielectric layer is adhered to overlayer 410.Equally, on second basal layer 450, can use the bonding coat (not shown), so that a surface of described layer is adhered to first basal layer 440.
As shown in table 1, dielectric layer 420 can be reduced to the unit-area capacitance of touch-sensitive device 400 and be lower than about 0.0305 pico farad/square millimeter, more preferably is lower than about 0.0187 pico farad/square millimeter, reduces the negative pixel effect in the equipment thus.
Should be appreciated that the lamination of touch-sensitive device is not limited to lamination shown in Figure 4, but can comprise other and/or extra play according to different embodiment.
Shown in Fig. 5 is illustrative computing system 500, and this system can comprise the touch-sensitive device with dielectric layer according to different embodiment described herein.In the example of Fig. 5, computing system 500 can comprise touch controller 506.Touch controller 506 can be single asic (ASIC), this integrated circuit can comprise one or more processor subsystems 502, these processor subsystems can comprise one or more primary processors, for example ARM968 processor or have similar functions and other processors of ability.Functional processor can change by special logic to be implemented, for example state machine but in other embodiments.Processor subsystem 502 can also comprise the peripheral hardware (not shown), for example the memory of random-access memory (ram) or other types or memory bank, WatchDog Timer or the like.Touch controller 506 can also comprise the receiving unit 507 that is used for received signal, and described signal can be the touch signal 503 of one or more sense channel (not shown)s, from other signals of other sensors of sensor 511 and so on or the like.Touch controller 506 can also comprise demodulation part 509, multilevel vector demodulation engine for example, and panel scanning logic 510, and by transmitting the radiating portion 514 that pumping signals 516 drive panel to touch sensor panel 524.Panel scanning logic 510 can be visited RAM 512, reads the data from sense channel automatically, and provides control to sense channel.In addition, panel scanning logic 510 can be controlled radiating portion 514, so that produce the pumping signal 516 that is in different frequency and phase place, wherein this pumping signal can be applied to each row of touch sensor panel 524 selectively.
According to different embodiment, touch sensor panel 524 can comprise dielectric layer, so that reduce the negative pixel effect.This dielectric layer can be set on the capacitance sensing medium of panel 524 of have row traces (for example driver circuit) and row trace (for example sense line), but also can use other sensed media and other physical configuration.Row traces and row trace can be made with the conducting medium of substantially transparent, for example tin indium oxide (ITO) or tin-antiomony oxide (ATO), but also can use other transparent and non-transparent material, for example copper.These traces can also be made with thin opaque material, and wherein this opaque material is transparent basically for human eye.In certain embodiments, row traces can be vertical mutually with the row trace, but in other embodiments, other non-Cartesian orientation also is feasible.For example, in polar coordinate system, sense line can be a concentric circles, and driver circuit can be the circuit (vice versa) that radially extends.Should be appreciated that thus term used herein " OK " and " row " have not only comprised orthogonal grid, but also comprise the intersection of other geometries or adjacent traces (the with one heart and radially circuit during for example polar coordinates are arranged) with first and second dimensions.For instance, these row and columns both can also can form on the reverse side of substrate being formed by the single face of the substrate of the substantially transparent of the dielectric material of substantially transparent separation, can also in the substrate of two separation that separated by dielectric material, form, or the like.
If trace is not through each other above and below (intersecting) or (but directly electrically contacting each other) adjacent one another are, actual two electrodes (but the trace more than two also can intersect) that formed of these traces so.Each of row traces and row trace is intersected or is adjoined and can represent a capacitance sensing node, and can be regarded as elementary area (pixel) 526, and when touch sensor panel 524 was considered as catching touch " image ", this pixel was very useful.(in other words, detect touch event on touch controller 506 has determined whether each touch sensor in touch sensor panel after, " image " (for example pattern of finger touch panel) that the pattern of the touch sensor of touch event can be regarded as touching takes place in the multiple point touching panel).When the row of appointment was maintained at direct current (DC) voltage level, the electric capacity between column electrode and the row electrode can be revealed as stray capacitance C
Stray, and when exchanging (AC) signal excitation appointment capable, it can be revealed as mutual signal capacitor C
SigBy the be touched variation Q of the signal charge that presents on the pixel of measurement
Sig, can detect finger or other objects near the existence the touch sensor panel or on it, it can be C that wherein said signal changes
SigFunction.Signal changes Q
SigIt can also be the capacitor C of finger or other objects of ground connection
BodyFunction.
Should be noted that, for instance, aforesaid one or more function can be inner and implemented by the firmware that processor subsystem 502 is carried out by being kept at storer (for example one of peripheral hardware), perhaps can be inner and implemented by the firmware that host-processor 528 is carried out by being kept at program storage 532.This firmware can also be in those any computer-readable recording medium storage inside and/or transmission of being used or being used in combination with it by instruction execution system, device or equipment, for example the computer based system, contain processor system or other those can extract instruction and carry out the system of these instructions from instruction execution system, device or equipment.In the linguistic context of this paper, " computer-readable recording medium " can be any medium that can comprise or store the program of being used or being used in combination with it by instruction execution system, device or equipment.Computer-readable medium can be including, but not limited to electronics, magnetic, optics, electromagnetism, infrared or semiconductor system, equipment or device, portable computer magnetic disc (magnetic), random-access memory (ram) (magnetic), ROM (read-only memory) (ROM) (magnetic), Erarable Programmable Read only Memory (EPROM) (magnetic), portable optical magnetic disc such as CD, CD-R, CD-RW, DVD, DVD-R or DVD-RW, or flash memory such as compact flash, safe digital card, USB memory device, memory stick.
In addition, firmware can also be at any transmission medium internal communication that uses or be used in combination with it for instruction execution system, device or equipment, for example, the computer based system, contain processor system or other those can extract the system of instruction and execution command from instruction execution system, equipment or device.In the linguistic context of this paper, " transmission medium " can be any medium that can transmit, propagate or transmit by instruction execution system, device or equipment program that use or that be used in combination with it.Transmission medium can be including, but not limited to electronics, magnetic, optics, electromagnetism or infrared wired or wireless propagation medium.
Should be appreciated that touch sensor panel is not limited to the described touch of Fig. 5, on the contrary, it can be according to different embodiment near panel or any other panel.In addition, touch sensor panel described herein can be single-point touches or multipoint touch sensor panel.
Be also to be understood that in addition computing system is not limited to element and the configuration of Fig. 5, but can comprise according to other and/or add ons in the configuration of the difference of different embodiment.
Therefore, according to above, some embodiment in the disclosure comprise a kind of touch-sensitive device, described touch-sensitive device comprises: the overlayer with tangible surface, the touch sensor layer, and be assemblied between overlayer and the touch sensor layer and thickness is about 0.50 millimeter dielectric layer, be used to reduce the touch sensor layer and near the capacitive coupling between the unearthed object on tangible surface, be configured to support first basal layer of touch sensor layer, described first basal layer has about 25 microns thickness, be configured to provide earth-shielded metal level, described metal level has and is approximately 10 microns thickness, and second basal layer adjacent with first basal layer, it is configured to support metal layer, described second basal layer has and is approximately 100 microns thickness, and wherein dielectric layer is configured to have and is used to reduce capacity coupled thickness.In other embodiments, dielectric layer and overlayer are configured to have and are used to reduce capacity coupled combination thickness.
Embodiment more of the present disclosure comprise the touch sensor layer that is configured to the object sensing touch apparatus, and specific inductive capacity is approximately 2.3 or littler and be attached to the dielectric layer that reduces the negative pixel effect that is associated with the ground connection situation of object in the equipment on the touch sensor layer substantially, wherein when object was unearthed, this dielectric layer was configured to reduce substantially to be sent to from object the quantity of electric charge of touch sensor layer.
Embodiment more of the present disclosure comprise that unit-area capacitance is about the dielectric material of 0.0407 pico farad/square millimeter, and this dielectric layer is configured to form the total unit-area capacitance less than about 0.0305 pico farad/square millimeter in touch-sensitive device.In other embodiments, dielectric layer is incorporated in the computing system.
Although with reference to accompanying drawing and in conjunction with embodiments of the invention the present invention has been carried out comprehensive description, should be pointed out that various changes and revising all is conspicuous to those skilled in the art.This type of change and modification are understood as that it is to comprise in the scope of the present invention that is limited by the accessory claim book.
Claims (20)
1. touch-sensitive device comprises:
Overlayer;
The touch sensor layer; And
Dielectric layer, described dielectric layer are set between overlayer and the touch sensor layer and are configured to unit-area capacitance with touch-sensitive device and be reduced to and be lower than about 0.0305 pico farad/square millimeter.
2. touch-sensitive device according to claim 1, wherein overlayer comprises at least one in glass and the plastics.
3. touch-sensitive device according to claim 1, wherein the touch sensor layer comprises silver.
4. touch-sensitive device according to claim 1, wherein dielectric layer comprises polypropylene.
5. touch-sensitive device according to claim 1, wherein dielectric layer comprises and is configured to non deformable material, so that keep about 0.50 millimeter or bigger distance between overlayer and touch sensor layer.
6. touch-sensitive device according to claim 1, wherein dielectric layer comprises that being configured to specific inductive capacity is approximately 2.3 or littler material.
7. touch-sensitive device according to claim 1, wherein dielectric layer comprises the material that is configured to support bonding agent, so that be adhered in overlayer and the touch sensor layer at least one.
8. touch-sensitive device according to claim 1 also comprises:
At least one bonding coat, it is configured to dielectric layer is adhered in overlayer and the touch sensor at least one.
9. touch-sensitive device according to claim 1 also comprises:
Be configured to support the basal layer of touch sensor layer with at least one printed layers.
10. touch-sensitive device comprises:
Overlayer with tangible surface;
The touch sensor layer; And
Dielectric layer, described dielectric layer have about 0.50 millimeter thickness and be assembled in overlayer and the touch sensor layer between so that reduce capacitive coupling between the unearthed object of touch sensor layer and tangible near surface.
11. touch-sensitive device according to claim 10, wherein overlayer has about 0.55 millimeter thickness.
12. touch-sensitive device according to claim 10, wherein the touch sensor layer has about 80 microns thickness.
13. touch-sensitive device according to claim 10 also comprises:
Be configured to support first basal layer of touch sensor layer, described first basal layer has about 25 microns thickness;
Be configured to provide earth-shielded metal level, described metal level has about 10 microns thickness; And
Adjacent with first basal layer and be configured to second basal layer of support metal layer, described second basal layer has about 100 microns thickness.
14. a touch-sensitive device comprises:
Be configured to the touch sensor layer that object sensing touches described touch-sensitive device; And
Dielectric layer, described dielectric layer have about 2.3 or littler specific inductive capacity and attached on the touch sensor layer, so that reduce the negative pixel effect that is associated with the ground connection situation of object in the touch-sensitive device substantially.
15. touch-sensitive device according to claim 14, wherein dielectric layer is configured to reduce substantially the value of the electric capacity that forms between the object and touch sensor layer when described object does not have ground connection.
16. touch-sensitive device according to claim 14, wherein the touch sensor layer comprises at least one printed layers, and described printed layers is configured to form electric capacity and has the variation that is associated with the touch of object in formed electric capacity.
17. a method of making touch-sensitive device comprises:
Between the overlayer of touch-sensitive device and touch sensor layer, provide dielectric layer; And
Use dielectric layer in touch-sensitive device, to form the total unit-area capacitance that is lower than about 0.0305 pico farad/square millimeter.
18. method according to claim 17 also comprises: provide unit-area capacitance to be approximately the dielectric layer of 0.0407 pico farad/square millimeter.
19. method according to claim 17 also comprises: provide unit-area capacitance to be approximately the dielectric layer of 0.0221 pico farad/square millimeter.
20. method according to claim 17 also comprises: the use dielectric layer forms the total unit-area capacitance less than about 0.0187 pico farad/square millimeter in touch-sensitive device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/610,051 | 2009-10-30 | ||
| US12/610,051 US20110100727A1 (en) | 2009-10-30 | 2009-10-30 | Touch Sensitive Device with Dielectric Layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102053749A true CN102053749A (en) | 2011-05-11 |
Family
ID=43478154
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010205849712U Expired - Fee Related CN202049459U (en) | 2009-10-30 | 2010-10-29 | Touch sensitive device |
| CN201010526485XA Pending CN102053749A (en) | 2009-10-30 | 2010-10-29 | Touch sensitive device with dielectric layer |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205849712U Expired - Fee Related CN202049459U (en) | 2009-10-30 | 2010-10-29 | Touch sensitive device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20110100727A1 (en) |
| EP (1) | EP2317420A1 (en) |
| CN (2) | CN202049459U (en) |
| TW (1) | TW201129924A (en) |
| WO (1) | WO2011053497A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN202049459U (en) | 2011-11-23 |
| EP2317420A1 (en) | 2011-05-04 |
| US20110100727A1 (en) | 2011-05-05 |
| WO2011053497A1 (en) | 2011-05-05 |
| TW201129924A (en) | 2011-09-01 |
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Application publication date: 20110511 |